I've got 2 spinning reels that reel flawlessly when anti-reverse is not engaged.  As soon as i flip the ani-revers switch on the rear of the reel, the reel won't budge, like it is ceased up.  Any suggestions?

odds are that something broke, just ship it to a mechanic and get them to look at it.

Strange to see this in two reels. Just to be sure, you are holding the rod with the reel mounted underneath. If not, you are trying to reel in reverse which is by definition what anti-reverse prevents. When you turn of the AR, you would in fact be back-reeling. If the reels are in fact mounted correctly and not working, I'll be happy to have a look at them.

Yes, the reel is underneath and is being turned in the correct position.  These were my brother's who just passed away and I got his fishing gear, we were both avid fishermen.  The last time he used his was we were fishing in saltwater, he washed them well, but something happened.  I took the spool off last night and there was no corrosion, going to open up the frame tonight.  They work flawlessly until the AR is engaged.  I really would like to get these working for sentimental value.

What kind of reels?

They are Diawa, don't have them with me to tell you the model.

OK, if you can get the model we might be able to look at schematics and get an idea where to look. It's really difficult to diagnose sight unseen though.

Ok, the reels is a diawa regal 2000xi. It is actually a really smooth real. I took the handle apart last night.  i tried to attach the 2 pics but the site won't let me attach them. I could email the pics directly to anyone who thinks they might be able to help me.  When it is engaged, the pinion drops down onto the gear. I think the question is, is the spiral thing the gear surrounds supposed to rotate. i appears that they might be ceased together. I hope that makes sense. I am by no means a reel mechanic, just trying to get my brother's reels operational. thanks for any help.

The gears in a spinning reel remain engaged all the time. All the AR lever does is trip a collar which tightens the AR clutch bearing around the pinion gear/sleeve assembly. The roller clutch (#34 on the schematic) is probably corroded especially since it's been used in salt water.

http://www.daiwa.com/PartsDiagram/PartsDiagram/RG-X1500-2000IA.pdf

DVT, I sent you an email with pix, hopefully you can open, they are from my blackberry.  Thanks for your help.