I Cant Send Credits

well im triying to send 40 credits for a tut but for some reason it wont let me,here is what appears everytime I try to send them

Sorry, you must use the form to send credits, this is to prevent cheating.

Anyone knows why is this happening?

 

Try copying and pasting their name cause it might have a symbol?

 

disable and close your firewall program such as zonealarm

this info can be found in one of the sticky thread

 

ok,thanks