Agent Login to Campaign shows "Error"

I have set up a campaign with leads and assigned a user to a group that allows to view ALL campaigns.
When I try to login the agent at for example:
/agc/vicidial.php
The campaign field drop down list is showing "--ERROR".
I'm not sure why this is happening!
Any ideas?
When I try to login the agent at for example:
/agc/vicidial.php
The campaign field drop down list is showing "--ERROR".
I'm not sure why this is happening!
Any ideas?