using functions from schannel.dll

Hi,
I am working on a project which requires me to clear the SsleCache. I have found a way to do this through schannel.dll.
A sample of my code:
<code>
HMODULE hSchannel;

hSchannel = LoadLibrary("TEXT("schannel.dll"));

emptyCache = (EmptyCacheFuncPtr) GetProcAddress(hChannel, "SslEmptyCacheA");

if(emptyCache != NULL)
{
emptyCache(NULL, 0)l
}

FreeLibrary(hSchannel);
</code>

The code compiles fine, but then when I run it it appears to run fine untill the end of the method where it moves into code which I can't see and crashes with a memory access error: 0xC0000005: Access violation writing location 0xfffffffd.

If anyone needs more info let me know

So... can anyone help me with why this code bugs out?
Cheers

Ed