Permissions issue with Multiping on Drupal 6.3

I can't get this module to work... What I have done:

Installed Multiping-6.x.1.x-dev
Enabled the module
Accessed the modules admin page
Click on any of the options to edit the settings - I get presented with an access denied message
Assign full permissions on that module to every user
Try again - same problem (I'm logged in the the User #1 tho anyway so that shouldn't make any difference)

Uninstall Multiping-6.x.1.x-dev
Download latest Multiping from CVS
Can not enable the module - "This version is incompatible with the 6.3 version of Drupal core."

Disable all other modules
Still can not enable the module

I don't know what else to try!