Originally Posted by Symar-FangofLloth
No.

If you're F2P, you can try once per character per day, on a predetermined challenge.
If you're Premium and do NOT purchase the pack, you can try Five times per character per day, on a predetermined challenge.
If you're VIP, or Premium and purchase the pack, you have unlimited runs of any challenge.

Stolen from the DDO forums.

There's a line extender on down the road which is spiking on one of the channels, causing my modem to think there's an issue and reboot to try and fix the problem. I'm back, but may crash out during the game. So don't count on me being much help tomorrow.