That happens on mine sometimes. I just hit the button harder, and more than twice.

 

mines got a problem where i cant unlock my doors from the driver side. i have to use the passanger side. Anybody have any ideas why?

 

I have something similar myself. on my 95 z28 convertible sometimes if I open the passenger door and then close it I cant lock the door with the remote. I can then only lock it using the switch on the driverside door or close the door then open the driver door and THEN hit the remote button.

incedentally I just had to put the car in the shop for a week, the theft deterrent system went bad and they had to replace the key cylinder in the steering column and then some electronics that went with it.