Data Services Designer Performance Issue

Hello Experts,

We have serious performance issue with DS Designer, To open one data flow it takes about 20 mins, I have checked network latency between database and client, which is not bad at all.

Packets Sent =4, Recd =4, Lost -0 (0%loss)

Approx round trip times in milli-secs

Min =16ms, Max =21 ms, Avg =18ms.

I have disable calculate column mappings from DS but there is no difference I see.

Please let me know what I am missing here.

Thanks,

Nis