modelsim compile error with systemC

[fazal_ece]

Hi,

I followed modeltech6.1d--> example-->sc_vlog--> test_ringbuf

and written a testbench.cpp.

As mentioned in the example i used

SC_MODULE_EXPORT(testbench);


while compiling with modelsim..... sccom -g testbench.cpp

i am getting the following error:

testbench.cpp: In function `void* mti__testbench(const char*, int)':
# testbench.cpp:12: parse error before `sc_module_name'
# ** Error: (sccom-6142) Compilation failed.

What is the meaning of the above errors???how to solve it??

regards.
fazal