HPSUM V7.1 error when starting

Hi,

We get the folliwng error when starting HPSUM (runing as administrator/login as local admin as well):

"HPSUM_service_x86.exe - Entry Point Not Found:

The procedure entry point InetPtonW could not be located in the link library WS2_32.dll"

We only get this on the following two servers which both have Server 2003 SP2 Std and IE7:

DL385G7

DL380G5

All of the 2008R2 servers run HPSUM without an issue.

Is this down to IE7 or am I overlooking something else ?

Any ideas would be appreciated !