Shell nested conditional statement, as far as possible close to two times to judge

if [$#! = 2]
Then
if [$ = "H"-O $ = "H"]
Then
echo "Help Info"
Else
echo "Error:invalid argument amount! Plz Input 2 directory names! "
Fi
echo "**************************************************************"
echo "* by Richard Zhang, Oct, 2008. *"
echo "* China contruction Bank, SuZhou Branch *"
echo "* Usage Example: ' sh $ <dir1> <dir2> ' *"
echo "* For help: ' sh $ H ' *"
echo "**************************************************************"
Exit 0
Fi

No problem, however, if
if [$#! = 2]
Then
echo "**************************************************************"
echo "* by Richard Zhang, Oct, 2008. *"
echo "* China contruction Bank, SuZhou Branch *"
echo "* Usage Example: ' sh $ <dir1> <dir2> ' *"
echo "* For help: ' sh $ H ' *"
echo "**************************************************************"
if [$ = "H"-O $ = "H"]
Then
echo "Help Info"
Else
echo "Error:invalid argument amount! Plz Input 2 directory names! "
Fi

Exit 0
Fi

When running under FreeBSD6.1, prompt "[: =: unexpected Operator"
Real Strange.