Help please!

I can understand what I am supposed to do but I think I may have encountered a glitch.

*Spoiler alert*

I can talk to Jack, everything is fine and I can get up to the bit where I stealth kill the second Sabbat guy. BUT I can't then pick the next lock even using Blood Buff, all I get is a message saying lock is beyond my skill.

Can anyone offer me a cheat to bypass this, using the tilde key does not seem to be opening the console!

Thanks in advance!