An error occurred accessing a data source.

Hi,

I have seen many posts talking about this error but still i am facing the same issue. The process i have followed is:

1) created infopath form with receive data connection to SQL DB with plain username/pwd

2) placed the repaeating table of receive dataconnection, form has full trust

3) converted the dataconnection to udcx and stored it in data connection library of site collection

4) published the form for admin approval, and as i am the admin i have uploaded it and activated it

5) approved the dataconnection

6) i have modified the infoath settings to use SQL authen, data connection files , cross domain

But still i am getting this error:

An error occurred accessing a data source.