User info (via Post or Get) is sometimes sent back sometimes not.

[oohkumar]

After a user has paid they are redirected back to our site.

The data we sometimes receive is: 

Array

(

[amt] => 0.01

[cc] => USD

[cm] => 0

[item_name] => Online Pre-Licensing Course: Text

[item_number] => 6788

[st] => Completed

[tx] => 5S212012RX152822H

)

However there should be name, email and other information posted back to us. Sometimes it works sometimes it doesn't. Any idea what is going on?