Help with this code snippet please

For some reason the gif image review.gif will get blurred or mangled
when it is sent to the clients browser using this code.
Can someone tell me what I'm doing wrong?


strcpy(req->objectname + strlen(req->objectname), "CHREVIEW.HTML");
req->objectlen = strlen(req->objectname);
if(tux(TUX_ACTION_GET_OBJECT, req) > -1 && !req->error)
{
	strcpy(req->objectname, "REVIEW.GIF");
	req->objectlen = strlen(req->objectname);
	req->event = 1;
	ret = tux(TUX_ACTION_GET_OBJECT, req);
	if(ret < 0 || req->error)
	{
		return tux(TUX_ACTION_FINISH_CLOSE_REQ, req);
	}
	else
	{
		return ret;
	}
}
---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.375 / Virus Database: 210 - Release Date: 7/10/2002