Corsair H100i standoff screws stuck with backplate

[VatsalS]

I was trying to install the Corsair H100i v2 on an ASUS Z170A motherboard for an Intel 6600k CPU. However, I believe I did not screw in the standoffs properly since the backplate is moving slightly (there is some space between the back of the motherboard and the backplate). I tried to remove the standoff screws but they wouldn't budge. Is there a way for me to remove them without damaging my motherboard?

Also, the thumbscrews that Corsair provided won't screw in all the way on the standoffs that I installed, however they screw in perfectly on the spare standoffs that Corsair provided.

Please help me figure this out as I do not want to leave the build in this state.

 

[maxwellmelon]

did you use the correct standoffs?

there are no spare standoffs there are two different ones for intel the 1151 and one for the 2011 socket, and then a set for amd sockets

almost sounds like you used the wrong standoffs or you have them backwards with the threads for the thumb screws actually screwed into the bracket.

 

[VatsalS]

did you use the correct standoffs?

there are no spare standoffs there are two different ones for intel the 1151 and one for the 2011 socket, and then a set for amd sockets

almost sounds like you used the wrong standoffs or you have them backwards with the threads for the thumb screws actually screwed into the bracket.

If I did use the wrong standoffs or screwed them in backwards then what can I do to get them out? Should I try using pliers to twist them off?