[c-nsp] SFP module on 2921 ISR router

[K bharathan]

hi
i'm trying to use a 1000base SFP module in cisco 2921 ISR ; on the router
SFP appears to be assigned to G0/1; but when i put a SFP-LX-SM module
nothing happens; no lights no connectivity and int is not coming up; is
there any configuration required to make fibre port identified
the following are given as certifed in a cisco doc
GLC-LH-SM= 1000Base-LX/LH 9/125 1310 Single 10 km
GLC-ZX-SM= 1000Base-ZX 9/125 1550 Single 100 km
CWDM-SFP-1470= 1000Base-CWDM 50 1470 Single 100 km

currently i'm using a converter (by TRANSITION Networks) (the SFP module in
this converter shows long range 20km)
which SFP module i can use?

suggestions  appreciated
thanks

regards
-bharathan