Apache cannot write to NFS mounted folder. File size is always zero.

I have mounted a folder from server1 to server2 to the media folder located in the document root of Apache web-server.. Which is installed in server2. But when the Apache tries to write a file to this mounted folder an actual file is created but the content is not written.. it always shows file size as 0 bytes. Please help me to resolve this issue. these are the steps I used to setup NFS mount.. For this I have chosen 2 Linux machines running CentOs 5.4 1) I have chosen server1(192.168.1.1) as NFS server And Server2((192.168.1.2)) as client. 2)installed nfs-utils on both machines using the command yum install nfs-utils. 3) Then I have edited the file /etc/exports on server1 using vim and added the entry /home/user/media 192.168.1.2(rw) Then saved it Again added necessary entry in host.allow & host.deny files Then started the portmap service and nfs service. I want these files to be manipulated by appache on server2 so I have set the user and usergroup to apache:apache for this folder. 4) Now from server2 I have started portmap and nfs.. then mounted this folder.. using the command mount 192.168.1.1:/home/user/media /var/www/html/media Every thing was correct till here... The folder from the server1 is now listed in server2.. i can now modify any file or folder inside the mounted folder from server2. But when Apache tries to write a file to this mounted folder an actual file is created but the content is not written.. it always shows file size as 0 bytes. Is this issue related to the user permission? or is this a serious mistake I did during my NFS mount steps? Can someone please help me in resolving this issue.. Thanks!

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