SOW validity issue for RFE

This the first time my company has applied for H1b and it got thru the lottery but after that i got an RFE.

I am concerned that my company had requested for 18 months visa (Nov 2015 -June 2016) but my SOW expires on 31 march 2015.I have a client manger letter

Will this cause any issue!!

 

Kindly guide me on thisSOW