Missing brackets in an if statement when using the "or" operator

My C++ code seems to have a problem with my opening and closing of brackets when I run it.

The line in question is shown below:

if ( (zpos[pmtID]<(zmin+(k*zscale))) || (zpos[pmtID]>(zmin+((k+width)*zscale))) ) {
        continue
        }   

I have used the bracket highlighting feature in gedit and all the brackets seem to match but I receive this error message:

Error: Cannot find matching ')' for '(' on line 103. 

* Interpreter error recovered *

This is the first time I have used the or operator so I am wondering if I used it correctly.

note: This is being compiled and run in ROOT (uses the CINT interpreter for C++)

Thanks,

Steve