You don't need to run wiper on Windows 7, OCZ wiper is for non TRIM OS such as XP. "For use within windows 7 there is absolutely no maintenance needed apart from allowing the machine to idle at the login screen for a few hours each week, this allows the garbage collection time to recover the drive and free up space TRIM has not been able to deal with. For all other windows based OS with no TRIM support...The simple answer is an application called Wiper.exe."
Now you can run it on Windows 7, but you have to jump thru some hoops.
Wiper runs in IDE mode, also if you have a Nvidia Chipset, it has to be changed to a windows controller for it to work. There are several threads on it over at OCZ, here is one in particular, that might help: Support Question Wiper Does not work,Can i use Sanitary Erase on OS,i can reinstall Vista(Vertex 120GB)
In all seriousness, it's a real hassle, just follow the quote above from the OCZ staff. Running it or not...either way I hope you enjoy your SSD!