Keyless entry working intermittenly

[rm4god2018]

Okay so I have a 1994 325i bmw and I have done some work on it to get it where I want it. So the keyless entry works sporatically. sometimes it works and then it doesnt and just beeps a few times. When this happens I cant lock all doors manually with the key; it locks then unlocks. any ideas anyone? only thing i can think of is replacing battery in keyless remote or is there a way to access OBC to fix this problem?. Okay so heres something else for you all to ponder on and give advice or help with. I recently reset oil service light from what i learned on this forum; my front windows used to roll-up automatically after holding button for a few seconds. Well, now after reseting oil service light( 5 sec max) they no longer auto-roll up. Suggestions anyone?