Searching Enclosed numbers and Roman numbers not working in Namzu

Hi All,

I'm trying to search enclosed numbers, (i.e  1 enclosed in a circle, 2 enclosed 
in a circle like \x{2460}　\x{2461} etc.) and roman numbers (like  \x{2160}\x{2161} etc.) using Namazu 
2.0.12 (with chasen 2.3.3 and kakasi 2.3.3) from a .pdf and .txt file.

The OS is Solaris 2.8 and locale is set to ja (through LC_ALL and LANG).

The search result is coming as 0, though Namazu is able to search other 
Japanese characters from the same file.

Any clue why Namzu is not able to search for those characters ?

Regards,
Sourav