HLA Programming

I keep getting an error at lines 45 abd 47 that says "Operands must be the same size" and at lines 59, 64, and 69 that says "Register and memory operands must be the same size". I'm not sure what to do to fix it any help would be greatly appreciated thank you!! (Please explain with step by step instructions).

program dateDemo; #include ( "stdlib.hhf" ) static day: month: uns8; year: uns16; 10 uns8; 12 13 14 15 16 17 18 19 20 21 packedDate: dword; begin dateDemo; //Reads input stdout.put("Enter the current month, day, and year: " stdin.get( month, day, year) //Pack the data into the following bits: /15 14 13 12 11 10 9876543210 23 24 25 26 27 28 29 30 31 32 mov( 0, eax mov( eax, packedDate; // Just in case there is an error if( month > 12 ) then stdout.put "Month value is too large", nl); elseif( month0 then stdout.put "Month value must be in the range 1..12", nl) elseif( day31) then 34 35 36 37 38 39 40 stdout.put "Day value is too large", nl elseif( day-0 then stdout.put "Day value must be in the range 1..31", nl ); elseif( year>99 thern stdout.put( "Year value must be in the range 0..99", nl); 42 43 else mov( month, ebx) shl( 16, eax); 45 program dateDemo; #include ( "stdlib.hhf" ) static day: month: uns8; year: uns16; 10 uns8; 12 13 14 15 16 17 18 19 20 21 packedDate: dword; begin dateDemo; //Reads input stdout.put("Enter the current month, day, and year: " stdin.get( month, day, year) //Pack the data into the following bits: /15 14 13 12 11 10 9876543210 23 24 25 26 27 28 29 30 31 32 mov( 0, eax mov( eax, packedDate; // Just in case there is an error if( month > 12 ) then stdout.put "Month value is too large", nl); elseif( month0 then stdout.put "Month value must be in the range 1..12", nl) elseif( day31) then 34 35 36 37 38 39 40 stdout.put "Day value is too large", nl elseif( day-0 then stdout.put "Day value must be in the range 1..31", nl ); elseif( year>99 thern stdout.put( "Year value must be in the range 0..99", nl); 42 43 else mov( month, ebx) shl( 16, eax); 45