problem in compiling a sample driver

[supersubu123]

hiii friends
i too get the same errror while compiling a kernel module in suse 10.1
whats the solution for it?

[Dimak_XXZZ]

[root@localhost hello]# insmod hello.ko
insmod: error inserting 'hello.ko': -1 Invalid module format
1.why i got -1 when inserting the module because i compiled the module with 2.6.20 for which i have source & tried to insmod form a precompiled 2.6.15 kernel(I HAVE DOWNLOADED 2.6.20 FROM KERNEL.ORG)
2.see my make it made the build to enter /usr/src/2.6.20 source ..where is ur make entering .....not able to luk for source code at all how will it compile

You must use your module only for the kernel, for which it has been compiled. So get .config for your 2.6.15 kernel, compile 2.6.20 with it and try to load hello.ko with 2.6.20.