loading difficulties with node and edge tables in windows

I created a node and edge table using Excel.
When attempting to load the above two tables in gephi 0.9.2, I get the edge table loaded and it creates automatically the nodes. Then, when i load the node table with id, label, they get loaded, however the edge table is cleaned up or emptied. Why?

Edge Sample:
Source Target
1 2
1 7
1 8
1 9
2 7
Node Sample:
1 raj
2 jaya
3 subbu
4 anasuya
5 rn