psu smoked than liquid on first build

apevia x-cruiser with 500w psu
CPU: E5200
2gb gingle ram
Optical Drive: Samsung 20x DVD-RW SATA $25
MSI G31M3-F

ok so i just did my build from a guide well last night i built it and i turn it on and it smokes and smells and i turned it off etc and now there is liquid in the case O_O

am i completely ****ed?

im gonna take it back to where i got all the parts and get them to take a look at it >_> mum wants to come so i can get it fixed for free

oh and i used the psu in the case as i has no money after buying the build so i thought id make do with the psu till i get some moneys