all fax printers are inaccessible in windows 2003 server

[lhovecoh]

hi i use a windows server 2003 and my problem is my fax printers see i configured my fax to send and receive all my faxes to my server and that's good im receiving and sending a fax without using a paper but sometimes my fax printer is good and sometimes it has a problem sometimes when i open my faxes a note is always appearing says "all fax printers are inaccessible" but sometimes its not appearing and its working properly. please i really want to fix this problem because my clients cant send and receive fax message i hope you can help me, is this problem has any solution? or can this problem i am hoping for your answer. thanks a lot