InfoPath Dev

Hi - Can someone tell how to fix this issue of mine, i have a user that has his laptop reformat, after that they reinstall office 2010 standard(without infopath), then i told them to just install a 2007 infopath because the form template is made in 2007 infopath. When they start with the application that is using infopath which is hosted in WSS 3.0, code behinds are not working anymore. I say not working because on load there is a code in FormEvents_Loading that autopopulate a textbox fields, now all empty. Thanks for the help.

 No error though? Is .NET Programmability support enabled?

Thanks Hilary for the reply, No error. the code just dont work on load of the form.

i already did the .Net Programmability , run from my computer before but no luck. now, they tried to update to 2010 infopath, when we load the form with code it is working, the issue now is when we submit it to a SharePoint library we get this error InfoPath cannot submit the form. The form cannot be submitted because it contains validation errors. Errors are marked with either a red asterisk (required fields) or a red, dashed border (invalid values). i dont see any validation error because im the one who created the template :(:(:(