C+C Drivers door won't open... Please help

Hi there everyone, I'm new to the forum so i do apologise if I have posted in the wrong section or anything.

I have a 2006 C+C and this morning the drivers door refused to open, the central locking works fine, the car starts fine, the manual key only opens and closes the passenger door but the damned door just refuses to budge! There is no resistance in the handle on the inside or outside, but I can hear the mechanism working in that side when I lock and unlock. What could this be? If I can't open the door can I still remove the door card and see whats going on?
You can remove door card. Drop window down and take it off from the top lifting it up over the door lip. Make sure you undo all the bolts first though.