Troubleshoot the problem with the following steps:

1. Navigate to a command prompt
2. Navigate to this folder: %programfiles%\common files\microsoft shared\web server extensions\12\bin
3. Execute this command on each of your XSN files: stsadm.exe -o verifyformtemplate -filename <complete path to your xsn including the name.xsn>

This will give a more detailed description about the errors.

if you are not sure if the access path is filled in for the InfoPath form you have deployed – you can rename the xsn file in the features directory to a CAB file and extract manifest.xsf from this file in this file – you should see that accessPath=”"

thanks : dainghia