Error 6 occurred at Open/Create/Replace File in Write Spreadsheet String.vi->Write To Spreadsheet File (string).vi->Untitled 1

Hi I'm getting the above error when attempting to get a file path control to write to a spreadsheet vi?

The spreadsheet is opened in open office but saved as a .xls in the documents folder.

The spreadsheet only contains one row and three columns each with text contained but when I run the VI and then open and view the actual speadsheet all three headers appear together in the A1 cell before the title error message appears.

Is Labview not compatible with open office? Perhaps someone can confirm if this is indeed the case?

Thanks in advance...