Integration problems



I've just installed gcl 2.4.0 and maxima 5.6 (from the tarball, not
CVS). Things seem be working fine, except for integration. Here are
some examples:

-----------------------------------------------------------------------

(C1) integrate(sin(x),x);
Division by 0
 -- an error.  Quitting.  To debug this try DEBUGMODE(TRUE);)
(C2) integrate(x,x);
				    2	   2
				   x  FALSE
(D2) 				   ---------
				       2
(C3) integrate(1/x,x);
(D3) 				    LOG(x)
(C4) integrate(1/x^2,x);
					  2
				     FALSE
(D4) 				   - ------
				       x
(C5) integrate(x,x,0,1);
					 2
				    FALSE
(D5) 				    ------
				      2

-----------------------------------------------------------------------

I understand D3, but none of the others. I've seen integration
problems mentioned in the list archives, but no solutions. Any
suggestions as to how I can fix this?

-- 
Mark Lawrence
www.unified-eng.com