CREATE DATABASE failed at stsadm -o extendvs

Anyone pls give me suggestion.

I am trying to create a new web application at sharepoint.

But cannot create from sharepoint central admin ... error occured "Unknown Error".

so I try to create with stsadm -o extendvs ... at that time error occured..

Directory lookup for the file "F:\MSSQL\DATA\WSS_Content_Internet_NewProd.mdf" f ailed with the operating system error 3(The system cannot find the path specifie d.). CREATE DATABASE failed. Some file names listed could no开发者_开发问答t be created. Check relat ed errors.

CREATE DATABASE failed at stsadm -o extendvs

pls give me any advice...

Check the ULS logs for detailed error messages. F:\MSSQL path that you have mentioned, does exist on the server, right?

Also, do you appropriate permissions?