InfoPath Dev

I am creating my first InfoPath form and it seems like such a great tool.  I created a great form that submits the data i need to an Access DB.  I published it to a network location and I can open it and it does exactly what I want it to do.  However, when a coworker tries to open the form she gets an error and it is blank.  What am I doing wrong?

 I am running Office 2007 / Most of my coworkers run Office 2003 / The Access DB is 2002-2003 format. /  I saved the form in 2003 format. / The design checker finds no compatability errors with 2003. / The full network path is correct. / My coworker has no trouble opening the Access DB

 Thank you for any suggestions,

Noah

I was able to get my coworker to open the form, however now I get this error when trying to submit to the Access DB:

InfoPath cannot connect to the data source.
Class not registered

The DB is in the same network location and my coworker can open the DB.

 Thank you

 Hi,

Make sure that your coworker has access to the network location where you have published the form.

If this is not the case then can you provide me the error message that she is getting.

Here is the error message my coworker gets:

InfoPath cannot connect to the data source.
Class not registered

Thank you