Guest Rhat cannot ping or putty into Host Win7

Hi all,

I have 2 Rhat vms running in my VMware workstation 6.5.4 in the host Win7 OS. I was able to putty into the 2 guest OS until this afternoon. I am trying to figure out the problem. Any suggestions?

-2 Guest OS: Redhat Enterprise 5 -Host OS: Win7 -All the 3 OS are under same netmask: 255.255.255.0 -They are in the same IP range: 192.168.x.x -The vmware network is NAT, and the VMs are under DHCP mode -Error for putty is:Network error -Connection timed out.

Thanks!