mfp network scanning

hi, i have a lanier ld160c, and three ld151's. they are all setup to
scan to network folders with the appropriate permissions. they have
been working great for the past year. i recently upgraded our network
storage, adding some drives to our existing raid. everything went
smoothly......except now the network scanning times out. I have check
the permissions and they are all in the scanner and the network share
properly. I have even tried using the admin password.....still no
luck. some of the smaller HP's MFP's can scan to network folders with
no problem. Any suggestions would be much appreciated.
jason