If your wallet still has that transaction you can do the following:
In the "Console" found in the "Debug Window" of the "Help" menu type:
getrawtransaction 07f6dff2acc8f91d496e32bc447e58892c252076a32b573fe1935ef103c9070f
Then press [ENTER] or [RETURN] on your keyboard.
You should get a long string of letters and numbers. This is the raw bytes of the transaction itself. It is what is broadcast across the bitcoin network to all nodes, therefore it is public and isn't anything that can be used to steal your bitcoins.
Post that string of characters here and we can tell you more about what happened and if/why the transaction won't confirm.