In theory, If you had your Parameters set up and working back then, they should be working now. Is your Timer0 consistent or does the Value keep changing each time you Calibrate.Well im having a weird problem...
I recently started doing RNGing again in black and white after not doing it since may and for some reason i cant RNG anything. Like when i try i either seem to miscount my advancements somehow or im not hitting my seed or something. Ive changed my parameters like 3-4 times already....
Here is where you should look for all the simple help:
http://www.smogon.com/ingame/rng/bw_rng_part7
It has the guides on there just click on the one you need.