Oops!  I pasted the wrong version of the patch in my previous msg.  Please ignore the previous as it had a typo in the if stmt. comparing for a newline.. 

--- src/modules/rlm_mschap/rlm_mschap.c.orig    Tue Oct  3 17:46:50 2006

+++ src/modules/rlm_mschap/rlm_mschap.c Thu Oct 12 15:36:04 2006

@@ -786,6 +786,9 @@

        } else {                /* run ntlm_auth */

                int     result;

                char    buffer[256];

+               VALUE_PAIR      *module_fmsg_vp;

+               char    module_fmsg[MAX_STRING_LEN];

+               int             module_fmsg_lastchr = 0;

                memset(nthashhash, 0, 16);

@@ -798,6 +801,13 @@

                                             NULL, NULL, 1);

                if (result != 0) {

                        DEBUG2("  rlm_mschap: External script failed.");

+                       snprintf(module_fmsg, sizeof(module_fmsg), "rlm_mschap: %s", buffer);

+                       module_fmsg_lastchr = strlen(module_fmsg)-1;

+                       if (module_fmsg[module_fmsg_lastchr] == '\n') {

+                               module_fmsg[module_fmsg_lastchr] = '\0';

+                       }

+                       module_fmsg_vp = pairmake("Module-Failure-Message", module_fmsg, T_OP_EQ);

+                       pairadd(&request->packet->vps, module_fmsg_vp);

                        return -1;

                }