--- zidrav4unix-1.1/core.cpp
+++ zidrav4unix-1.1/core.cpp
@@ -323,6 +323,7 @@
 
 	CreateChecksum( buffer, size, &crc );
 
+	st.tellg();
 	st.write( (char *)&crc, 4 );
 
 	delete [] buffer;