slow written in windows user using samba

Hi!,

I have a xserve with 10.5.8 mac os X server.

Since 2 weeks more or less, When my windows user wants to save a .doc/.xls file, they have to wait a little bit until the written is ok.

If you read o browse the folders and files, you dont have problems. Only when I open a file and save it. you have to wait a little to complete the operation.

I restart de SMB service and the server but the problem continue.

Any idea about that?

Thank you very much and sorry for my English.

Álvaro.