Pathfinder - can not use obliterator bow !

Please help - Pathfinder level 82, with 269 dex / 184 intel / 147 str , can not use Obliterator bow (item level 82) which requires lvl 78 and 163 dex, regardless if it is positioned on 1st or second hand..

Message with red text: "You cannot use this item. Its stats will be ignored".
Skills like "Poisonburst arrow", "Gas arrow", "Vine arrow" cannot pe used with this bow - message: Incorrect weapon type

Any ideas ?

Tks,
Aze

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Later edit: SOLVED