Repin the connector. Here are the pins and associated parts. You can re use the connector housing. If the connector on the board has any corrosion, then you will need to attend to that as well.

http://www.rtbb.com.au/catalog/advanced_search_result.php?keywords=.100&osCsid=c9920ee3c86965f9539b86fa071b696c&x=0&y=0

You will also require a crimper that is usually only found overseas

http://www.greatplainselectronics.com/Category-73.asp

1026-CT or 1028-CT can be used. I have a 1028-CT that I use for all crimping (.100, .156, .093 & .062)
No thats not the type of plug.
It's the one that the wires come in from the side and the wires are pierced onto the top of I think double wipe pins and should have a cover over the top to hold them in place.
As seen on the top left and on the display mid left of this pic