grails internationalization: a strange behaviour -

i'm using grails project , i'm facing little trouble. have internationalization system , use messages.properties files list strings needs internationalized. i've created 1 follows:

<g:message code='logged.in.as'/> 

in messages.properties file have following:

logged.in.as=logged in as\: 

but, when load browser, see following

logged.in.as 

why strange behaviour?notice use <g:message> tag lot of other strings , works well...