Do you have mcrypt enabled in PHP?
Does the link work for normal users?
What version PHP are you using?

To test if it is returning your username and password correctly edit

/modules/mod_cebridge/ajax/getDomain.js

between lines 93 and 94 add

alert(xmlHttp3.responseText);

save and login again. This time there will be a popup dialog box. Look for <input type="hidden" name="email" value="email@example.com" /><input type="hidden" name="passed_password" value="password" />

Does the email and password match your clientexec installation? Can you read your password or is it garbled?

Don't forget to remove that line (new line 94) from getDomain.js.

Thanks,
Shannon