XML Mapping and Export Problem for Microsoft Excel 2007

The Excel worksheet contains data

1st Column

[FONT=Times New Roman]Part Name [/FONT]
[FONT=Times New Roman]Left Mount Bracket [/FONT]
[FONT=Times New Roman]Left Mount [/FONT][FONT=Times New Roman]Bolts [/FONT]
[FONT=Times New Roman]Front Cover[/FONT]
[FONT=Times New Roman]WaterPump [/FONT]
[FONT=Times New Roman]Bolts[/FONT]

2nd Column

[FONT=Times New Roman]No. of Bolts [/FONT]
3
3
3

3rd Column

[FONT=Times New Roman]Bolt Size (mm)[/FONT]
M12
M12
M12

4th Column

Pretension Load(KN)
63.8
63.8
63.8

Added Developer option , then import a XML File and Mapped the XML element for Part Name,Bolt Size,No of Bolts,Pretension Load.

when mapping PartName, BoltSize ,No of Bolts,Pretension Load ,its selecting the cell only it has values.

so when verify map for Export it show as
" A mapped elements relationship with other elements cannot be preserved"

As a result,Export option not working.

Problem is,
when mapping Part Name its selects all cells,is there any possible to select the cells by the user wants while mapping…

Kindly waiting for Reply