Error while making requests to Quickbooks-Online -

we unable make requests quickbooks online. while trying communicate quickbooks api keep on getting

general io error while proxying request; errorcode=006003

some sample requests: https://quickbooks.api.intuit.com/v3/company/386413351/query?query=select+*+from+companyinfo&requestid=1a91078d661245dc809f31870c4ccdb9&minorversion=1&

https://quickbooks.api.intuit.com/v3/company/1280984235/query?query=select+count%28*%29+from+item&requestid=a4569163846943379801926b21c21e81&minorversion=1&

all of them ending in same error message. helpful, if has clue this.

{"fault":{"error":[{"message":"message=general io error while proxying request; errorcode=006003;statuscode=500","code":"6003"}],"type":"service"},"requestid":"e803880ca8d1448a9e2d87d194b08541","time":"2014-12-02t07:12:42.955z"}