Unable to delete the solr entry, what am i doing wrong?

[TH30]

I am using http://code.google.com/p/solr-php-client/ to communicate with the solr from PHP. Every thing is working fine, but Delete.I am using the \[code\]deleteById\[/code\] function which in turn creates \[code\]<delete fromPending="true" fromCommitted="true"><id>13967</id></delete>\[/code\]request, and it returns true.But in actual entry is not being deleted. I don't understand what is wrong in it..