New module not appearing in grc

Hi all,I created a module and added a block to it using
gr_modtool.make-test showed pass for both tests.However, it is not
appearing in grc. Instead when I use gnuradio-companion command it shows
following in the terminal:[ehsan@GRB mygn]$ gnuradio-companion
** (process:5765): WARNING **: Trying to register gtype
‘GMountMountFlags’ as enum when in fact it is of type ‘GFlags’
** (process:5765): WARNING **: Trying to register gtype
‘GDriveStartFlags’ as enum when in fact it is of type ‘GFlags’
** (process:5765): WARNING **: Trying to register gtype
‘GSocketMsgFlags’ as enum when in fact it is of type 'GFlags’Warning:
Block validation failed:
/usr/local/share/gnuradio/grc/blocks/howto_square2_ff.xml:1:0:ERROR:VALID:DTD_NOT_PCDATA:
Element block was declared #PCDATA but contains non text
nodes/usr/local/share/gnuradio/grc/blocks/howto_square2_ff.xml:2:0:ERROR:VALID:DTD_UNKNOWN_ELEM:
No declaration for element
category/usr/local/share/gnuradio/grc/blocks/howto_square2_ff.xml:3:0:ERROR:VALID:DTD_UNKNOWN_ELEM:
No declaration for element
import/usr/local/share/gnuradio/grc/blocks/howto_square2_ff.xml:4:0:ERROR:VALID:DTD_UNKNOWN_ELEM:
No declaration for element
make/usr/local/share/gnuradio/grc/blocks/howto_square2_ff.xml:6:0:ERROR:VALID:DTD_UNKNOWN_ELEM:
No declaration for element
key/usr/local/share/gnuradio/grc/blocks/howto_square2_ff.xml:7:0:ERROR:VALID:DTD_UNKNOWN_ELEM:
No declaration for element
sink/usr/local/share/gnuradio/grc/blocks/howto_square2_ff.xml:9:0:ERROR:VALID:DTD_UNKNOWN_ELEM:
No declaration for element
type/usr/local/share/gnuradio/grc/blocks/howto_square2_ff.xml:10:0:ERROR:VALID:DTD_UNKNOWN_ELEM:
No declaration for element
nports/usr/local/share/gnuradio/grc/blocks/howto_square2_ff.xml:12:0:ERROR:VALID:DTD_UNKNOWN_ELEM:
No declaration for element
source/usr/local/share/gnuradio/grc/blocks/howto_square2_ff.xml:14:0:ERROR:VALID:DTD_UNKNOWN_ELEM:
No declaration for element
type/usr/local/share/gnuradio/grc/blocks/howto_square2_ff.xml:15:0:ERROR:VALID:DTD_UNKNOWN_ELEM:
No declaration for element nports Ignoring:
/usr/local/share/gnuradio/grc/blocks/howto_square2_ff.xmlWarning: Block
validation failed:
/usr/local/share/gnuradio/grc/blocks/howto_square_ff.xml:1:0:ERROR:VALID:DTD_NOT_PCDATA:
Element block was declared #PCDATA but contains non text
nodes/usr/local/share/gnuradio/grc/blocks/howto_square_ff.xml:2:0:ERROR:VALID:DTD_UNKNOWN_ELEM:
No declaration for element
category/usr/local/share/gnuradio/grc/blocks/howto_square_ff.xml:3:0:ERROR:VALID:DTD_UNKNOWN_ELEM:
No declaration for element
import/usr/local/share/gnuradio/grc/blocks/howto_square_ff.xml:4:0:ERROR:VALID:DTD_UNKNOWN_ELEM:
No declaration for element
make/usr/local/share/gnuradio/grc/blocks/howto_square_ff.xml:6:0:ERROR:VALID:DTD_UNKNOWN_ELEM:
No declaration for element
key/usr/local/share/gnuradio/grc/blocks/howto_square_ff.xml:7:0:ERROR:VALID:DTD_UNKNOWN_ELEM:
No declaration for element
sink/usr/local/share/gnuradio/grc/blocks/howto_square_ff.xml:9:0:ERROR:VALID:DTD_UNKNOWN_ELEM:
No declaration for element
type/usr/local/share/gnuradio/grc/blocks/howto_square_ff.xml:10:0:ERROR:VALID:DTD_UNKNOWN_ELEM:
No declaration for element
nports/usr/local/share/gnuradio/grc/blocks/howto_square_ff.xml:12:0:ERROR:VALID:DTD_UNKNOWN_ELEM:
No
declaration for element
source/usr/local/share/gnuradio/grc/blocks/howto_square_ff.xml:14:0:ERROR:VALID:DTD_UNKNOWN_ELEM:
No declaration for element
type/usr/local/share/gnuradio/grc/blocks/howto_square_ff.xml:15:0:ERROR:VALID:DTD_UNKNOWN_ELEM:
No declaration for element nports Ignoring:
/usr/local/share/gnuradio/grc/blocks/howto_square_ff.xmllinux; GNU C++
version 4.7.2 20120921 (Red Hat 4.7.2-2); Boost_104800;
UHD_003.005.000-26-gb65a3924
<<< Welcome to GNU Radio Companion v3.6.3-6-gca407436 >>>
Loading: “/home/ehsan/mygn/Ssb.grc”>>> DoneWhat commands should use: To
check my module. To make it appear in GRC

Best Regards
Begh