# Activemerchant

**URL:** <https://www.ruby-forum.com/t/activemerchant/177767>\
**Category:** Rails\
**Created:** [October 23, 2009, 11:27am UTC](https://www.ruby-forum.com/t/activemerchant/177767 "2009-10-23T11:27:44Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![smit\_shah](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/87869e/32.png) [@smit\_shah](https://www.ruby-forum.com/u/smit_shah)\
**Post date:** [October 23, 2009, 11:27am UTC](https://www.ruby-forum.com/t/activemerchant/177767/1 "2009-10-23T11:27:44Z")

</div>

Hi All…

I have implemented activemerchant using gem.

I am using both STANDERD & EXPRESS checkout.

My EXPRESS works very well but when I use STANDERD one, paypal gives me  
error like  
“This transaction cannot be processed due to an invalid merchant  
configuration”.

Any idea whats going wrong???

Thanks in advance…

---

<div class="post-metadata">

**Author:** ![smit\_shah](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/87869e/32.png) [@smit\_shah](https://www.ruby-forum.com/u/smit_shah)\
**Post date:** [October 23, 2009, 1:50pm UTC](https://www.ruby-forum.com/t/activemerchant/177767/2 "2009-10-23T13:50:46Z")

</div>

You might want to try the ActiveMerchant list instead:  
[http://groups.google.com/group/activemerchant?hl=en](http://groups.google.com/group/activemerchant?hl=en)

dwh