34972A正在清除以前的CONF命令，只保留最后一个

我有一个34972A安装了20通道多路复用器。
我正在使用USB和VISA连接C＃进行编程。
我将CONF命令发送到单元，然后是CONF？
命令确认。
然而，当我发送下一个CONF命令时，单元正确响应，之前配置的通道返回到关闭状态。
Code Snippet string output =“CONF：VOLT：DC AUTO，MAX，（@”+ channelList +“）”;
Benchlink.Connection.WriteString（输出）;
Console.WriteLine（输出）;
Benchlink.Connection.WriteString（ “CONF？”）;
Console.WriteLine（Benchlink.Connection.ReadString（））;
string output =“CONF：VOLT：DC 100，MAX，（@”+ channelList +“）”;
Benchlink.Connection.WriteString（输出）;
Console.WriteLine（输出）;
Benchlink.Connection.WriteString（ “CONF？”）;
Console.WriteLine（Benchlink.Connection.ReadString（））;
-----输出CONF：VOLT：DC AUTO，MAX，（@ 101,102,103）“VOLT + 1.000000E + 01，+ 1.000000E-03”，“VOLT + 1.000000E + 01，+ 1.000000E-03”，“
VOLT + 1.000000E + 01，+ 1.000000E-03“CONF：VOLT：DC 100，MAX，（@ 104）”VOLT + 1.000000E + 02，+ 1.000000E-02“任何人都可以了解为什么只有最多
存储最近的CONF命令并清除之前的命令？
我读过的每个代码示例都表明这应该可以正常工作。
我尝试过的事情：1。每个命令结束时的Environment.NewLine 2. CONF之前的冒号（:) ... 3.完全输入命令：CONFigure：VOLTage：DC AUTO，MAX，（@ ...）
提前谢谢，Eric PS
没有CODE标签，真的吗？



     以下为原文

  I have a 34972A with a 20 channel mux installed. I am programming in C# connected by USB and VISA. I send the CONF commands to the unit followed by the CONF? command for confirmation. The unit responds correctly, however, when I send the next CONF command the previously configured channels return to an off state.

Code Snippet

string output = "CONF:VOLT:DC AUTO,MAX,(@" + channelList + ")";
Benchlink.Connection.WriteString(output);
Console.WriteLine(output);
Benchlink.Connection.WriteString("CONF?");
Console.WriteLine(Benchlink.Connection.ReadString());

string output = "CONF:VOLT:DC 100,MAX,(@" + channelList + ")";
Benchlink.Connection.WriteString(output);
Console.WriteLine(output);
Benchlink.Connection.WriteString("CONF?");
Console.WriteLine(Benchlink.Connection.ReadString());

-----
Output

CONF:VOLT:DC AUTO,MAX,(@101,102,103)
"VOLT +1.000000E+01,+1.000000E-03","VOLT +1.000000E+01,+1.000000E-03","VOLT +1.000000E+01,+1.000000E-03"

CONF:VOLT:DC 100,MAX,(@104)
"VOLT +1.000000E+02,+1.000000E-02"

Can anyone shed some light on why only the most recent CONF command is stored and the previous are cleared? Every code example I have read suggests this should work fine.  

Things I have tried:
1. Environment.NewLine at the end of each command
2. Colons (:) before CONF...
3. Typing out the command completely :CONFigure:VOLTage:DC AUTO,MAX,(@...)

Thanks in advance,
Eric

P.S. No CODE tags, really?