Problems with identity impersonate parameter in web.config file. H

I've been trying to use the identity impersonate parameter, as Microsoft Tech
Support indicated I should, to enable a .Net application to access an
MS-Access .mdb file on a Windows 2003 voice response system server at the
same time that the IVR application on that server has the file open for
update. So far this does eliminate the error that .Net was previously giving
("File in Use"), but now I get the following error in .Net:

Could not create Windows user token from the credentials specified in the
config file. Error from the operating system 'Logon failure: unknown user
name or bad password.
Source Error:
Line 3:
Line 4:
Line 5: password="don"/>
Line 6:
Line 7: