top task bar not visible (roundcube logo, settings, logout etc.)

[macetaria]

I did a standard setup in my test folder: http://new.3sign.be/roundcube/ but some things seems to be missing. Overall everything works fine, but it appears some styes are missing at log-in page and the top taskbar does not appear at all (all browsers).
I tried some things, but I have no idea how to solve the issue.

[macetaria]

Some more details:
- PHP Version 5.0.3
- MySQL 4.1.12

I can read and sort my mails, Now (higher alert level) I have this warning:
* CAPABILITY IMAP4 IMAP4rev1 ACL QUOTA LITERAL+ MAILBOX-REFERRALS NAMESPACE UIDPLUS ID NO_ATOMIC_RENAME UNSELECT CHILDREN MULTIAPPEND BINARY SORT THREAD=ORDEREDSUBJECT THREAD=REFERENCES ANNOTATEMORE IDLE STARTTLS AUTH=GSSAPI AUTH=GSSAPI AUTH=GSSAPI AUTH=DIGEST-MD5 AUTH=DIGEST-MD5 AUTH=DIGEST-MD5 AUTH=CRAM-MD5 AUTH=CRAM-MD5 AUTH=CRAM-MD5 SASL-IR
cp01 OK Completed
Trying CRAM-MD5
+ ...a bunch of numbers... +
Got challenge: + ...a bunch of numbers (the same as before)...+
Tried CRAM-MD5:
Tried PLAIN: Resource id #31

[extra info]
I installed another template (the nice blue one) but this did not fix the problem. PHP/apache is running under macosX server 10.3