Периодически отваливается SQL Remote

вот что пишет в логе.

I. 07/17 01:30:52. RETR 1
I. 07/17 01:30:52. +OK 2311 octets
I. 07/17 01:30:52. RETR 1
I. 07/17 01:30:52. +OK 2311 octets
I. 07/17 01:30:52. Received message from "rs_rugun" (0-0001408631-0001463037-0)
E. 07/17 01:30:52. SQL statement failed: (-308) Connection was terminated
I. 07/17 01:30:53. QUIT
I. 07/17 01:30:53. +OK Was it as good for you, as it was for me? (clean as a baby)
I. 07/17 01:30:53. closesocket
I. 07/17 01:30:53. Execution completed

из за чего может такое быть??