请求各位大侠帮忙指教：多谢了！

我的protel 2004里画原理图时project选项里最下面一个project option （设置电气检查规则）选项为何老是灰色，不好用？画一个简单的图后，检查原理图电气连接老显示错误，哪怕画最简单的共发射极电路。显示如下：Class Document Source Message Time Date No.
[Error] Sheet1.SchDoc Compiler Signal PinSignal_Q1_2[0] has no driver 9:42:00 2008-6-18 1
Class Document Source Message Time Date No.
[Error] Sheet1.SchDoc Compiler Signal PinSignal_C1_2[0] has no driver 9:42:00 2008-6-18 2
是不是指三极管和电容没有信号驱动？我加上一个信号后又变成：

Class Document Source Message Time Date No.
[Error] Sheet1.SchDoc Compiler Signal PinSignal_10KHz_1[0] has no driver 9:46:00 2008-6-18 1
[Error] Sheet1.SchDoc Compiler Signal PinSignal_C1_2[0] has no driver 9:42:00 2008-6-18 2
怎么信号还要驱动？电容要什么驱动？很是郁闷，不明白，请高手帮忙指点，不甚感激！[em06][em06]