Not able to add query Specification to the Data Provider

1. Create Document

     String Create= "<document><name>Doc</name><folderId>4825</folderId></document>"

2. Added Data Provider

    String Create = <dataprovider><name>eFashion</name><dataSourceId>4835</dataSourceId></dataprovider>"

3.After Dataprovider creation I am using the below code to add queryspecification

4. Getting  the below error. Please help