We have a application which runs on HTTPs protocol, in this case when we use the dyna tree which itselef make a call to WCF service then in dyna tree we are getting the load error. but if we run the same application through http protocol then it is working fine. Incase of firefox and chrome it is workingfine with HTTPs, but there is some issue with 1.2.5 version of dyna tree due to this it is not wrking in IE with Https.

I have seen Dynatree running with https, so we need more information: what do you see on the console? Network pane? Do requests reach the server? ...

Can't help without more info...