The only things I can think of that could go wring with this camera are:
Batteries are not fully loaded or not new. When not having enough power the flash can't be charged enough, so it won\t fire.
the second thing could be you dailed in the wrong setting. The setting is for full sun light and yu are taking pictures inside. (not likely.)
The film package you are using is out of date or was stored wrong. (not likely eighther)
The flash (camera) is defect