/\ What he said... I'd find out if there's a way to test the oil press. switch with a multimeter though before you go and buy another one, because once that switch is out of the box, much less installed, you're not going to be able to get your money back for it if you find out it isnt the problem.
Definitely try another oil filter and check the old one for damage/obstructions. If it doesnt fix the problem, use a band-style tool if you can to remove it, so it wont damage the filter and you can re-use it later.
I do *HAVE* to ask...you didnt use filter plyers to tighten the new one down did you?? Only asking cause Ive seen people do it before and damage the new filter.
What's your idle speed? If you bring the rpms up just a little, like 200 rpms, does the light go out?
"I smell blood and an era of prominent madmen"- W.H. Auden
The dead list: 04 EX500(sold), 98 VTR1000F(traded in)
07 Kawasaki ZX6R-Opened exhaust valve, Jumper mod, de-screened stock air filter, -1/+1 sprockets, green EK chain, ZG smoked double-bubble , solo cowl, Scorpio alarm.