ODC tree in asp .net

i have a problem on odc tree .tree is displaying proper way but get the session store value (display the path example:

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Main Cat Subject  >>  >>

Sub Cat Subject  >>

Sub Cat Subject L1  >>

Sub Cat L2  >>

Sub Cat L3  >>

Level4

) highlet the particular link of path in tree 
level4 is the active position in the tree 
please share any idea