trouble selecting database

[Birdman]

I just downloaded the Wireless Database Viewer plus and I'm having trouble selecting a database that I want to sync.  The file I want to sync with is a Microsoft Access database, but instead of being saved as .mdb it is saved as .mpddb.  To open the file as an Access file you have to put in a password, which I also have.  Is there a way to select the file with the extension .mpddb?

[CellicaTeam]

Please let us know version of MS Access you are using?
If possible, please send us sample database.(mpddb) which you are trying, send it at support@cellica.com.

[Birdman]

Actually, I just got it to work because I could change the file extension to .mdb. 

However, I keep getting the following error message for any of the fields I've tried to change:

"Native Error Code: -1504
Driver Message:='[Microsoft][ODBC Microsoft Access Driver] You tried to assign the Null value to a variable that is not a Variant data type. '

Not sure why I keep getting that error.  Any suggestions/help?

[CellicaTeam]

Could you please send us sample database for which you are getting this problem. You can send it at support@cellica.com