Update frame by script

[winamp]

The second call returned 1 and this is the result from call 1, but the frame didn't update:

Code:

$('.graph').find('iframe').attr('src', 'http://192.168.0.101/Tag1')  
{…}
0: <iframe border="0" src="http://192.168.0.101/Tag1" width="1045" height="431" frameborder="0">
context: HTMLDocument http://192.168.0.130/scada-vis/#6
length: 1
prevObject: {…}
 0: <div class="item graph item-iframe" style="top: 336px; left: 0px; z-index: 10; width: 1045px; height: 431px;">
 context: HTMLDocument http://192.168.0.130/scada-vis/#6
 length: 1
 prevObject: Object { 0: HTMLDocument http://192.168.0.130/scada-vis/#6, context: HTMLDocument http://192.168.0.130/scada-vis/#6, length: 1 }
 selector: ".graph"
 __proto__: Object { jquery: "2.2.4", constructor: G(), length: 0, … }
 selector: ".graph iframe"
__proto__: Object { jquery: "2.2.4", constructor: G(), length: 0, … }

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Well now it worked again after a while, but I didn't change anything.
I just wanted to check if the script is correct, maybe it's a browser problem. If I discover why it didn't work I'll post it. Thank you anway.