sybase 客户端支持HA的开发, 特请教各位大虾!

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各位大哥, 请问谁有sybase ct_library 支付 sybase12.5 双机经验, 敬请不吝赐教!
     我搞了三天了, 还没搞定

     有ServerA /ServerB
     
1:程序启动时连ServerA, 虽ServerA不通, 也可以直接连通到ServerB
2:可是程序启动时连到了ServerA, 运行过程中数据库切换到ServerB, 程序就连不通ServerB, 出错信息如下:

   
Open Client Message:
Message number: LAYER = (1) ORIGIN = (2) SEVERITY = (0) NUMBER = (201)
Message String: ct_results(): user api layer: internal Client Library error: HAF
AILOVER:Trying to connect to serverA server.

Open Client Message:
Message number: LAYER = (1) ORIGIN = (2) SEVERITY = (0) NUMBER = (201)
Message String: ct_connect(): user api layer: internal Client Library error: HAF
AILOVER:Trying to connect to serverB server.

Open Client Message:
Message number: LAYER = (1) ORIGIN = (2) SEVERITY = (0) NUMBER = (201)
Message String: ct_connect(): user api layer: internal Client Library error: HAF
AILOVER:Trying to connect to serverA server.
******In Appsrv*****            in thread :5write Fee Fail