sql server - SQL Report Builder concatenate images and fields -

i trying display in table cell value of field , embedded image, i'm trying this:

=fields!page_navigation.value & image1.value 

but i'm receiving message

name 'image1' not declared  

my image outside table , it's hidden, want appear next page navigation value.

i'm not sure if text box allow embedded image, complaint because engine can't see find image1 should try prefixing image1 collection identifier, not sure in reportbuilder, try controls!image1