Code signer error in blackberry webworks application

I have developed a Blackberry Webworks Application, code signed it and deployed it on my playbook. The problem is that, I have made some changes to my existing application, generated the sigtool.p12 file and when i try to complile it using

bbwp "MyReport.zip loc开发者_JS百科ation" -gcsk myPassword -gp12 myPassword-buildId 2 -o "Output file locaiton"

Iam getting the following error

[INFO]                  Parsing command line options
[INFO]                  Parsing bbwp.properties
[INFO]                  Validating WebWorks archive
[INFO]                  Parsing config.xml
[INFO]                  Populating application source
[INFO]                  Compiling WebWorks application
[INFO]                  Packaging the bar file
[INFO]                  Bar packaging complete
[INFO]                  Starting signing tool
barsigner error: Server returned HTTP response code: 502 for URL: http://www.rim
.net/Websigner/servlet/RDK-Waterloo
[ERROR]                 Signing failed

RIM signing servers sometimes are down for maintenance or for another purpose. Try to sign your application later.