[squid-users] comm_open: socket failure: (55) No buffer space available

I am using Squid 2.4Stable3 on FreeBSD 4.5. I have been getting this error over and
over in cache.log:

comm_open: socket failure: (55) No buffer space available

when doing 'netstats -m' I noticed that I had peaked out at my max mbuf clusters, so I
recompiled the kernel with more mbuf clusters. I also upped kern.maxfiles and
kern.maxfilesperproc. Finally, I recompiled squid. However, I am still getting the error.
Do I need to shrink the size of the cache on disk so that squid uses less RAM perhaps?
Perhaps squid doesn't see the new buffer space available? I am planning to get more
RAM for this system, but here is its setup:

P3-600, 128MB PC133. I have a disk cache of 5GB, the disk is IDE and is using
UltraATA-33.

'netstat -m' reports the following:

---
130/976/16384 mbufs in use (current/peak/max):
        130 mbufs allocated to data
128/956/4096 mbuf clusters in use (current/peak/max)
2156 Kbytes allocated to network (17% of mb_map in use)
0 requests for memory denied
0 requests for memory delayed
0 calls to protocol drain routines
---
Thanks,
Lucas