Opening a text file in excel

[emma]

Hi - when trying to open a text file, saved on a network
share in excel, i get the following error.

filename.txt cannot be accessed. The file may be read-
only, or you may be trying to access a read-only location.
Or, the server the document is stored on may not be
responding.

All the permissions are in order.

Any ideas?

thankyou
emma