Could anyone tell me what&#39;s this error about? It happened to me quite often.<div><br><div><div>2010-11-18 20:45:52.690158 [ERR] skypopen_protocol.c:259      [|] [ERRORA       259  ][interface00    ][UP,INPROGRS] Skype got ERROR: |||ERROR 21 Unknown/disallowed call prop|||</div>
<div>2010-11-18 20:45:52.690158 [ERR] skypopen_protocol.c:261      [|] [ERRORA       261  ][interface00    ][UP,FNSHED] skype_call now is DOWN</div></div><div><br></div><div>Thanks!</div><div>Jian</div></div>