sendmail.cf rcpt problem

[SLG]

I am having a very strange problem on 2 of my AIX boxes.
I have added the following lines to my sendmail.cf on 3 of them:

###
R< $+ @ $=w > $@ OK
R< $+ @ $=R > $@ OK
###
R$* $: $(dequote &quot;&quot; $&{client_name} $)
R$=w $@ OK
R$=R $@ OK
R$@ $@ OK
###
R$* $#error $: &quot;550 Relaying Denied&quot;

It is working fine on 1 of them(AIX 4.2.1), but the other 2(AIX 4.1.5) give me this error:

/etc/sendmail.cf: line 1050: invalid rewrite line &quot;R< + @ =w > @ OK&quot; (
tab expected)
/etc/sendmail.cf: line 1051: invalid rewrite line &quot;R< + @ =R > @ OK&quot; (
tab expected)
/etc/sendmail.cf: line 1054: invalid rewrite line &quot;R* : (deq
uote &quot;&quot; &! )&quot; (tab expected)
/etc/sendmail.cf: line 1055: invalid rewrite line &quot;R=w @ OK&quot;
(tab expected)
/etc/sendmail.cf: line 1056: invalid rewrite line &quot;R=R @ OK&quot;
(tab expected)
/etc/sendmail.cf: line 1057: invalid rewrite line &quot;R@ @ OK&quot;
(tab expected)
/etc/sendmail.cf: line 1060: invalid rewrite line &quot;R* #error
: &quot;550 Relaying Denied&quot;&quot; (tab expected)

All 3 boxes are running Sendmail 8.9.2.

Is is possible that AIX 4.1.5 doesnt support those rcpt rules?
Any help would be appreciated!