[maxmsp] Audio freeze problem

Hi maxers,

here is a simple patch that freezes audio when I load a file with  
sfplay~ (it's the same with buffer~).
To unfreeze the patch, I have to stop and restart audio again...
That's not a matter of cpu which stays at 0%.

Macbook Pro 2GHz
Mac OS 10.4.11
MaxMSP 4.6.3

Does anyone guess the reason of this freeze? (metro freezes also, so  
not only audio freezes)
Or just a nicer way to unfreeze than stop and restart audio?

Thanks


max v2;
#N vpatcher 308 91 707 321;
#P origin -26 -102;
#P toggle 155 162 15 0;
#P window setfont "Sans Serif" 9.;
#P window linecount 1;
#P newex 155 67 48 196617 loadbang;
#P newex 155 92 64 196617 metro 1000;
#P user meter~ 260 95 340 108 50 0 168 0 103 103 103 255 153 0 255 0  
0 217 217 0 153 186 0 12 3 3 3 3;
#P newex 260 69 55 196617 cycle~ 1.;
#P user ezdac~ 24 147 68 180 0;
#P button 155 115 15 0;
#P newex 155 136 54 196617 dspstate~;
#P newex 71 96 21 196617 t 0;
#P toggle 58 44 15 0;
#P message 29 44 30 196617 open;
#N sfplay~  2 120960 0 ;
#P newobj 29 73 53 196617 sfplay~ 2;
#P window linecount 3;
#P comment 259 116 100 196617 Just to ensure audio is really  
active... or not not in fact !;
#P window linecount 1;
#P comment 154 182 100 196617 Theorical state ?;
#P comment 29 22 321 196617 • when loading a file \, audio and metro  
freeze ! :-(;
#P connect 3 0 9 0;
#P connect 5 0 3 0;
#P connect 4 0 3 0;
#P fasten 6 0 5 0 76 119 101 119 101 40 63 40;
#P connect 3 1 9 1;
#P connect 3 2 6 0;
#P connect 13 0 12 0;
#P connect 12 0 8 0;
#P connect 8 0 7 0;
#P connect 7 0 14 0;
#P connect 10 0 11 0;
#P pop;

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