Errors Compiling Kernel 2.4.9 with support for ESSSolo1

I got errors when saying "make modules_install"!
I wanted to insert it as a module and also tried to build it into the kernel.
When I call modules_install, an error occured.

depmod : *** Unresolved symbols in /lib/modules/2.4.9/kernel/drivers/sound/esssolo1.o

depmod :        gameport_unregister_port_Rsmp_b8ce4307
depmod :        gameport_register_port_Rsmp_f891976c

I am using an ACER Travelmate, Celeron, Redhat 7.1.

If you need further information, please send an email to me

Thanks, Richard