Infopath 2007 cannot run a query (that runs in Infopath 2003)

[colezpapa3]

I have created some forms in Infopath 2003 that connect to Access Tables. The forms have several lookups (using rules). All our users have Infopath 2003 and Access 2003. I was instructed to setup 2 addtional users, and have been unable to get the form to load. Firstly, they have Infopath 2007, the error message is...Infopath cannot create a new blank form. The query cannot be run for the following Dataobject: XXXX_Lookup
Infopath cannot run the specified query. Infopath cannot connect to the data source.

Does anyone have any ideas? Is it Infopath 2007????
I have checked the drive mappings.