Just realized that that VIB you have is pretty old. If you are running ESXi 5.1, try the latest version:
http://www.dell.com/support/drivers/us/en/555/DriverDetails?driverId=MMPDK
If you are using a previous verison, you can click the blue See Previous Versions link at the top of that page to make sure you have the latest version for your version of ESXi.
