Exhibit 3.7

CERTIFICATE OF FORMATION

OF

VCDI HOLDING LLC

FIRST: The name of the limited liability company is VCDI Holding LLC.

SECOND: The address of its registered office in the State of Delaware is 615 South DuPont Highway, County of Kent, City of Dover, in the State of Delaware, 19901. The name of its registered agent at such address is National Corporate Research, Ltd.

IN WITNESS WHEREOF, the undersigned has executed this Certificate of Formation this 10th day of January, 2005.

VCDI HOLDING LLC
By:	/s/ Christian H. Mittweg
	Name:    Christian H. Mittweg
	Title:      Authorized Person