Invalid maximum heap size PLEASE HELP

I am making a Bukkit server this is the code i put into note pad .bat ="C:\Program Files (x86)\Java\jre7\bin\java.exe" -Xmx 1.5G -jar craftbukkit.jar
PAUSE

PLEASE HELP When i press the file it opens cmd and says about heap size and any key please help !

 

I don't think 1.5G is enough to run a server. You can try changing 1.5G to 1500m, but it is probably that that just isn't enough to start your server.

 

"C:\Program Files (x86)\Java\jre7\bin\java.exe" -Xmx 1.5G -jar craftbukkit.jar
PAUSE

 

Try this Chuck:
Echo OFF
java -Xmx1536m -Xms1000m -jar "craftbukkit.jar"
PAUSE

lol I hope some user named echo doesn't get a notification about that

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

IT says JAva is not reconized as a internal....

I didnt do my Port Forwarding YET .I wanna do it after i mangae the server thing to work .Does POrt Forwarding effect the command ?

 

replace -Xmx 1.5G with -Xmx1536m

 

No, this has nothing to do with port forwarding. Try what necrodoom said; -Xmx1536m

 

You shouldn't have a space between the -Xmx and the size value.