After upgrading to Parallels 9 my Windows 3.11 virtual machine doesn't run anymore. Sometimes I get a crash report right after starting Parallels 9, at least when I start the Windows 3.11 machine. All other virtual machines are still working. Any ideas?
Many thanks in advance,
pyr0
Here's the report (Thread 19 crashed):
	Code:
	
Process:         prl_vm_app [912]
Path:            /Applications/Parallels Desktop.app/Contents/MacOS/Parallels VM.app/Contents/MacOS/prl_vm_app
Identifier:      prl_vm_app
Version:         9.0 (23062.920702)
Code Type:       X86-64 (Native)
Parent Process:  prl_disp_service [557]
User ID:         501
Date/Time:       2013-09-30 15:01:55.305 +0200
OS Version:      Mac OS X 10.8.5 (12F37)
Report Version:  10
Crashed Thread:  19
Exception Type:  EXC_ARITHMETIC (SIGFPE)
Exception Codes: EXC_I386_DIV (divide by zero)
...
Thread 19 Crashed:
0   com.parallels.vm              	0x00000001003b2259 0x100000000 + 3875417
1   com.parallels.vm              	0x00000001003891f1 0x100000000 + 3707377
2   com.parallels.vm              	0x00000001003894b3 0x100000000 + 3708083
3   com.parallels.vm              	0x000000010028cab3 0x100000000 + 2673331
4   QtCorePrl                     	0x00000001020e43ca QThread::terminate() + 762
5   libsystem_c.dylib             	0x00007fff928b9772 _pthread_start + 327
6   libsystem_c.dylib             	0x00007fff928a61a1 thread_start + 13
...
Thread 19 crashed with X86 Thread State (64-bit):
  rax: 0x0000000000000000  rbx: 0x000000010401d0e0  rcx: 0x0000000000000000  rdx: 0x0000000000000000
  rdi: 0x000000010401d0f0  rsi: 0x0000000000000000  rbp: 0x000000010ddcbd70  rsp: 0x000000010ddcbd60
   r8: 0x00000000ffffffff   r9: 0x000000010ddcbe38  r10: 0x00000000000007dd  r11: 0x0000000000000071
  r12: 0x0000000000000000  r13: 0x000000010ddcbe38  r14: 0x0000000000000000  r15: 0x00000000ffffffff
  rip: 0x00000001003b2259  rfl: 0x0000000000010246  cr2: 0x00000001003b2240
Logical CPU: 2
...
External Modification Summary:
  Calls made by other processes targeting this process:
    task_for_pid: 1
    thread_create: 0
    thread_set_state: 0
  Calls made by this process:
    task_for_pid: 0
    thread_create: 0
    thread_set_state: 0
  Calls made by all processes on this machine:
    task_for_pid: 594
    thread_create: 0
    thread_set_state: 0
VM Region Summary:
ReadOnly portion of Libraries: Total=181.9M resident=116.5M(64%) swapped_out_or_unallocated=65.4M(36%)
Writable regions: Total=138.4M written=4920K(3%) resident=72.0M(52%) swapped_out=0K(0%) unallocated=66.4M(48%)
 
REGION TYPE                      VIRTUAL
===========                      =======
IOKit                               580K
MALLOC                             46.1M
MALLOC guard page                    48K
MALLOC_LARGE (reserved)            8192K        reserved VM address space (unallocated)
Mach message                          4K
STACK GUARD                        56.1M
Stack                              18.3M
VM_ALLOCATE                        64.6M
__DATA                             22.5M
__IMAGE                             528K
__LINKEDIT                         54.9M
__TEXT                            127.0M
__UNICODE                           544K
mapped file                        50.1M
shared memory                       308K
===========                      =======
TOTAL                             449.4M
TOTAL, minus reserved VM space    441.4M