Cannot create any files on a filesystem

I am running RedHat AS release 3 Taroon update 4 on HP DL740 server.

When I login to my user account see the following shell prompt 

-bash-2.05b$

When normally I should be seeing the following shell prompt

[fred1@systema fred1]$


Also when I create a file using vi editor and try to save the file, I get
the an error message saying "text.txt" E212: Can't open file for writing" and then I hit enter where upon
I am out back into vi. I can exit vi if I quit form it.

Can anyone help me.

Thanks

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