mule custom transformer works in studio, but not deployed to standalone server -

I have flows with a custom transformer. This flow works when I run it under Rick Studios, but Mile fails when run by standalone server error message "There is no class for element custom transformer (name = update table)"

   & Lt; Collective-splitting doctor: name = "collection splitter" /> & Lt; Custom-transformer class = "com.domain.UpdateTable" doc: name = "update table" & gt; & Lt; Spring: Property Name = "Table" Riff = "Table" /> & Lt; / Custom transformer & gt; & Lt; / Flow & gt;   
 I also found, but there was no answer;   
 
 
 This error was caused by java.lang.NoClassDefFoundError, which catches the malfunction and "not of the element Class "message here is a error in my case due to the exception from a static initial.