Most likely corruption:

A **DeCompile** may help here ...

But first, if you have not already:
Check for any **Missing References via the VBA Editor>>Tools>>References ....

Then, follow this procedure:

0) **Backup your MDB**
1) Compact and Repair the MDB, as follows:
Hold down the Shift key and open the MDB, then from the menu >>Tools>>Database Utilities>>Compact and Repair ...
2) Execute the Decompile (See example syntax below) >> after which, your database will reopen.
3) Close the mdb
4) Open the mdb and do a Compact and Repair (#1 above).
5) Open the mdb:
    a) Right click over a 'blank' area of the database window (container) and select Visual Basic Editor. A new window will open with the title 'Microsoft Visual Basic' ... followed by then name of your MDB.
    b) From the VBA Editor Menu at the top of the window:
       >>Debug>>Compile
        Note ... after the word Compile ...you will see the name of your 'Project' - just an fyi.

6) Close the mdb
7) Compact and Repair one more time.

*** Executing the DeCompile **EXAMPLE**:
Here is an **example** of the command line syntax  (be SURE to adjust your path and file name accordingly) for executing the decompile:

Run this from Start>>Run, enter the following command line - **all on one line** - it may appear like two lines here in the post:
Also, the double quotes are required.

"C:\Program Files\Microsoft Office\Office\Msaccess.exe" /decompile "C:\Access2003Clients\YourMdbNameHERE.mdb"

For more detail on the Decompile subject ... visit the Master on the subject (and other great stuff) Michael Kaplan:

http://www.trigeminal.com/usenet/usenet004.asp?1033

mx