Help i got an Error

I running an Fiesta Server on

Windows WebServer 2008 R2
CPU: Intel® Core™ i7-920 Quad-Core
inkl. Hyper-Threading-Technologie
8gb DDR3 Ram

and i got this error

56. 22:24:24 CSocket_IOCP::Write, INVALID m_Socket=-1
57. 22:37:24 CSocket_IOCP::Write, INVALID m_Socket=-1
58. 22:37:25 ERROR - CSocket_IOCP::Shutdown
59. 22:43:27 CSocket_IOCP::Write, INVALID m_Socket=-1
60. 22:43:28 ERROR - CSocket_IOCP::Shutdown