A25363 Bentley will not keep time!!!!!

[Rolextraderflorida]

I purchased a pre owned Breitling for Bentley A25363 about a month ago, and it has been giving me nothing but trouble. When I first received it, the chronograph start/stop pusher would not activate the 30 second chrono. I brought it to a local watchmaker, and he was able to fix this problem. However, when the watch is fully wound, it will not run for more than two days straight. I wind this watch everyday, and it still goes dead. My watchmaker says the movement looks clean, and he replaced the mainspring...I am clueless!!! Anybody know what may be causing this?

Best,
Brett