Help needed, please...I get the following error when trying to create a volume, after the formatting finishes:

/proc/misc: No entry for device-mapper found
Is device-mapper driver missing from kernel?
Failure to communicate with kernel device-mapper driver.
/proc/misc: No entry for device-mapper found
Is device-mapper driver missing from kernel?
Failure to communicate with kernel device-mapper driver.
Incompatible libdevmapper 1.02.27 (2008-06-25)(compat) and kernel driver
Command failed

I've done some reading but can't come up with a concrete step to solve the problem. It looks like I need the dm module, but don't know where/how to get it. I am not a power kernel user.