Windows 7: Easeus Partition Manager error

I am using the newest edition of Easeus Partition Manager Home/Free edition and I am unable to add any space to the "F:\" partition. I have been able to change all of the others around just fine, but I cannot move the unallocated space into the F partition or even move F over to the left.

Windows reboots and goes into the manager as normal before the Windows boot and I always get a message that there is an error on the disk and Easeus cannot continue. And then it just cancels the operation.

I have some knowledge in the program, but I haven't the slightest why it is claiming I have an error, or what that error could be. If anyone knows of a way to fix this, I would appreciate it.