convert -draw text with numbers problem

friends

I have a difficulty with convert -draw text

with my script of


#!/bin/bash
# make bba slate 	vers 1	js 	7.21.2011
#############################
##
echo "----------------<  slate start   >-------------"

## here are some vars 6 lines 6 vars
dbIDVal=FA000747
srcVal=WBEN-TV
slugVal=nnnnnnnnnn
dateVal=yyyy/mm/dd
lenVal=10:00
#lenVal=number
sndVal=SOF

#lin 1	--DatabaseID#

convert ~/bba/bba_blank.png \
-fill black -pointsize 25 -draw "text 70,160 'Database ID#'" \
-fill black -pointsize 25 -draw "text 240,160 $dbIDVal" \
-fill black -pointsize 25 -draw "text 70,200 'Source'" \
-fill black -pointsize 25 -draw "text 240,200 $srcVal" \
-fill black -pointsize 25 -draw "text 70,240 'Slug'" \
-fill black -pointsize 25 -draw "text 240,240 $slugVal" \
-fill black -pointsize 25 -draw "text 70,280 'Date'" \
-fill black -pointsize 25 -draw "text 240,280 $dateVal" \
-fill black -pointsize 25 -draw "text 70,320 'Length'" \
-fill black -pointsize 25 -draw "text 240,320 $lenVal" \
-fill black -pointsize 25 -draw "text 70,360 'Sound'" \
-fill black -pointsize 25 -draw "text 240,360 $sndVal" \
~/bba/slate4.png


i get an error of

convert: Non-conforming drawing primitive definition `text' @
draw.c/DrawImage/3140.

due to lenVal=10:00
it hates numbers?
i also ahve a problem if i make
dateVal=yyyy/mm/dd  something like dateVal=2011/07/21

It seems no amount of double quotes , etc etc seem to work
and Yet I think - there must be a way
so my Q is


also i should mention the above script successfully makes a png.
but the $lenVal ( if the value is numbers ) is blank

THANKS!

j