Control List View function is not working as expected in robot framework

[Deepu]

Hi , I am using AutoIt on Robot framework. And I try to automate a window with SysListView32 control in it. When try to retrieve selected row value from the control it gives a empty.    
 

${itemValue}    Control List View    windowName    ${EMPTY}    28416    GetText    1    1

Log To Console    ${itemValue}

Control List View function is not working as expected.  FindItem, GetText, GetSubItemCount etc are not giving expected return values as documented.