You have not provided enough information.
When posting about an error, three things are generally required:
-The exact text of the error, or a screenshot if it happens in such a way that you cannot copy the text.
-A pastebin or other listing of any error log file, if applicable. The location of this log varies for different plugins, but for VTank it is c:\vtank-error.txt.
-A decal export.
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Virindi
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****Virindi Plugins FAQ****
http://www.virindi.net/wiki/index.php/Virindi_Plugins_FAQ
http://www.virindi.net - Virindi Tank, Follower, Integrator, Reporter, VCS5, XPHelper, Item Tool, HUDs, etc...
Decal Core Dev -
http://www.decaldev.com