Japonica

So i opened the Technic launcher to play some Hexxit. When i pressed play, it began to load, but when it finished instead of opening the minecraft mojang screen, it just put me back to the launcher with the play button again. Here is what the console sayd; [B#347] Error occurred during initialization of VM [B#347] Incompatible minimum and maximum heap sizes specified [B#347] Picked up _JAVA_OPTIONS: -Xmx256M [B#347] Analytics Response [runModpack]: 200 if anyone could help that would be great, i love the Technic platform but i cant seem to play my favorite mods anymore!