AVR-Chat

Hi. Everyone

I have an error reading the TCNT1L, TCNT1H from the 16-bit counter, im 
using the ICP1 and when this causes an interruption the High and Low 
bits of the counter must be read.

When i try to assemble the project i got i message which says

operand 2 out of range and gives me the address of the counter registers

in r6,TCNT1L
in r7,TCNT1H

I will acknowledge any help